book Maths Puzzle Numerical Ability

what is the equasion of the line parallel to y=4x-3 through the point (-1, 2)

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Sally wants to buy some things for her hair. She can buy 2 scrunchies & 4 barretts for $12.50 or 1 scrunchie & 6 Barretts for $12.25. How much does the scrunchie cost theat she wants to buy?
Thank you how do you solve this problem : 2e and then in the exponent log base 3 (x +2) = 14?